Author/Authors :
Guilhem، نويسنده , , D. and Samaille، نويسنده , , F. and Bertrand، نويسنده , , B. and Lipa، نويسنده , , M. and Achard، نويسنده , , J. and Agarici، نويسنده , , G. and Argouarch، نويسنده , , A. and Armitano، نويسنده , , A. and Belo، نويسنده , , J.H. and Bej، نويسنده , , Z. D. Berger، نويسنده , , G. and Bouquey، نويسنده , , F. and Brun، نويسنده , , C. and Chantant، نويسنده , , M. and E.Corbel and Delmas، نويسنده , , E. and Delpech، نويسنده ,
Abstract :
A new concept of multijunction-type antenna has been developed, the Passive–Active Multijunction, which improves the cooling of the waveguides and the damping of the neutron energy (for ITER) compared to Full Active Multijunction. Due to the complexity of the structures, prototypes of the mode converters and of the Passive–Active-Multijunction launcher were fabricated and tested, in order to validate the different manufacturing processes and the manufacturerʹs capability to face this challenging project. This paper describes the manufacturing process, the tests of the various prototypes and the construction of the final Passive–Active-Multijunction launcher, which entered into operation in October 2009. It has been commissioned and is fully operational on the Tore-Supra tokamak, since design objectives were reached in March 2010: 2.75 MW – 78 s, power density of 25 MW/m2 in active waveguides, steady-state apparent surface temperatures <350 °C; 10 cm long distance coupling.
Keywords :
ITER , Tore-Supra , Long pulse , Passive–active , Brazing , Rf heating , Lower hybrid
